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FIXITMAN, Master Technician
Category: Buick
Satisfied Customers: 17331
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01 buick w/ 180k miles. It's throwing a P0101 code and the

Customer Question

01 buick w/ 180k miles. It's throwing a P0101 code and the engine dies. It cranks over just fine but will run for only 1 second then quits. I've already replaced MAF sensor (GM part), EGR valve, fuel pump & filter. If I clear the code the car starts and runs fine until the next event. Pressure on the fuel rail is consistent at 48 psi at idle. Looking at the live data stream on my scan tool the only reading that seems out of order to me is the LTFT B1 is running consistently in negative numbers -9 to -14%. These values at idle and 2000 rpm. I am stumped.
JA: Do you have a voltmeter? If so, have you checked the battery's voltage?
Customer: Yes. 14 and change. Failed to mention new battery also.
JA: What is the model of your '01 Buick?
Customer: Lesabre Limited
JA: Are you fixing your LeSabre yourself? What have you tried so far?
Customer: I had the MAF sensor replaced at a GM dealership -- thinking initially that their GM scanners would be more descriptive and point them to the problem -
JA: Anything else you want the mechanic to know before I connect you?
Customer: Just looking for some advice.
Submitted: 8 months ago.
Category: Buick
Expert:  FIXITMAN replied 8 months ago.

Hello, my name is***** you tell me if the engine smells like fuel when it is running?

Customer: replied 8 months ago.
not that I've noticed.
Expert:  FIXITMAN replied 8 months ago.

Thank you. I would first check the fuel pressure regulator. With the key on pull the hose from the regulator on the fuel rail and see if fuel comes out. If it does then the regulator is bad. How often does this occur?